National Marine Underwriters, Inc. (NMU), a member of OneBeacon Insurance Group, is a leading underwriter of recreational boats/yachts and six passenger charter boats. Marine Insurance is all we offer and we have been successfully underwriting this class of business since 1983.

Specializing on one niche class of business allows us to concentrate our efforts and provide a comprehensive and competitive product, responsive customer service and skilled expertise.

We understand that accidents happen, which is why proper insurance coverage is so essential. We make sure that our policies are written in plain language, so that our clients can easily understand what coverage is provided; and flexible, so we can customize to your particular needs.

Our goal is to make the process of insuring your boat as easy as possible- so you can enjoy time on the water, not worrying about paperwork!